feat(versal): deprecate build time arg VERSAL_PLATFORM

Update Versal platform to enable runtime detection of variants instead
of relying on the build argument VERSAL_PLATFORM.
Integrate functionality for identifying the board variant during
runtime, allowing dynamic adjustment of CPU and UART clock values
accordingly.
Print the runtime board information during boot.
This advancement streamlines the build process by eliminating
dependencies on variant-specific builds, enabling the use of a single
binary for multiple variants.
Removing all the platform related constants for versal_virt,SPP,EMU as
they are not used.

Change-Id: I8c1a1d391bd1a8971addc1f56f8309a3fb75aa6d
Signed-off-by: Amey Avinash Raghatate <AmeyAvinash.Raghatate@amd.com>
Signed-off-by: Maheedhar Bollapalli <MaheedharSai.Bollapalli@amd.com>
diff --git a/plat/xilinx/versal/platform.mk b/plat/xilinx/versal/platform.mk
index 2f07996..6cc28e1 100644
--- a/plat/xilinx/versal/platform.mk
+++ b/plat/xilinx/versal/platform.mk
@@ -1,5 +1,5 @@
 # Copyright (c) 2018-2021, Arm Limited and Contributors. All rights reserved.
-# Copyright (c) 2022-2023, Advanced Micro Devices, Inc. All rights reserved.
+# Copyright (c) 2022-2024, Advanced Micro Devices, Inc. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 
@@ -44,8 +44,9 @@
     $(eval $(call add_define,IPI_CRC_CHECK))
 endif
 
-VERSAL_PLATFORM ?= silicon
-$(eval $(call add_define_val,VERSAL_PLATFORM,VERSAL_PLATFORM_ID_${VERSAL_PLATFORM}))
+ifdef VERSAL_PLATFORM
+    $(warning "VERSAL_PLATFORM has been deprecated")
+endif
 
 ifdef XILINX_OF_BOARD_DTB_ADDR
 $(eval $(call add_define,XILINX_OF_BOARD_DTB_ADDR))